Apparatus for bending and driving in staples



June 17, 1947. R. c. HAZEWINKEL APPARATUS FOR BENDING AND DRIVING IN STAPLES Filed Jan. 51 1939 Patented June 17, 1947 ;.UNITED STATES :APPARATU SFOR- BENDING DKDRLVING vIN SZIABLES Application-January 31, 1-9 39, -Serial,. N0. 253r,-931

.IntheNetherlands February 28,i1938 Section 3,iPublicLaw 690, August -8; 1946.

Patent expires 4 Claims. 51 .fIhe invention relates :to:;apparatus for "bend- ;ing-.and:driving staples which are arrangedwin :theapparatusinthe formnof. a flat band.

:The; apparatus. according: to the invention-has the advantage that two 1 functions, 1 namely the =-bending1andi the driving of :the :staples are carried :out: separately ;:by1.parts :of the mechanism. Thus these .iparts can :be constructed in such a manner as-:to'.be wbestradapted for the ;.purpose. The Zinvention relates to apparatus adapted to :use :a fiat band 10f staplet-materialzand' is :conr'structed topbe operatedbyione hand.

L'Ihe apparatus is :provided with ;.a :handle "by .VlhlChi it .is: held andtpressedzagainst: the;:material to ;-:be stapled :andzzprovided with-.two strips, one :for bending the staples over an-ianv'ilrigidlyconcnected torthe'body. ofzthe apparatustan'd thesother .for thammering the. staple. *Pawls are provided Tor/releasing the strips: one afteritheother. The spropulsionofzthezstaple'b and;in.a: known manner is: dependent on. the'zposition iof thesetpawls with qrespectr to the. bending mechanism..moved :by ;:the

pressure on the handle.

According :to the: invention :a :spring :is guided -by-azpawl; which holdsfast: the-hammering :mech- :anism durin :'the bending 'of :the .zstaple and i is raised -when:the bending ofithe staple is :.completed. 1 Other .means also guide'diby the position :01? the bendingstamp whenthetstamps; have: come mack: to about their starting position: effects "the :propulsion of the staples, ;at the :same -;.time:.inr.tro'ducing one staple :into the channel :of the hammering stamp.

:Bysso diverting :all movement from the :bending mechanism, it 'is :possible :to :commence :and 'to J eflect -all necessary.manipulations :.by :one .zmovement, so that the apparatus can be'held fast and handled by one single hand. For the entire utilization of the to and fromoving stroke of the bending stamp it is efficient to guide the organ for the'moving-up ofthe-staple band, in v-su cha=way,=that the moving-up pressureis exercised when the stamps have come.back-to.their starting position.

Other features'and-objects of the invention will be apparent from a consideration of the accomapanying :drawing. and the 1 following description :wherein an exemplary embodiment of the inven- :tion is :disclosed.

in the :drawing:

Fig. 1 is a sectionalviewofthe .apparatus taken on the line I'I of Fig; 3.

li'ig.' 2=is an end elevationalyiew with the'hood removed.

Fig. 3 is an inverted plan :view.

February 28, 1958 ;.-'2 Fig-:4 is ;an-,enlargedelevational View of :the

hood. v

-Fig.:5 is1an= elevational viewrof-an-en-d: portion'of -.the*rbending:-and hammering stamps.

.5 IzFjgrG is a'sectio-nalview:takeni'onthe'line-VI--- -'7 is ean enlarged lperspective viewt'of .the ::top .-;portion 0f 1 the staple fforming plunger sand the :driver.

Rig/28': isagperspective view: of: the hammerr-illustratingr'the staple.=forming plunger in Va idepressed; position.

Figni) isvan:enlargedyperspective :view 'of the anvil andrpartslassociated therewith.

:The:apparatus-mainly: COiHSiStSSOfg parts: forithe -storage,=the :conduct-ionreandr the .propulsioncof the staples, whichearerconveyedin.theform of: as'iflexii'bie wband,eandr of parts for the :conduction :an'd :guidance'iof 1 the -:driving ranid thecbending -rham- .20 lemming-mechanism.

Thecasing lvserves as: container for the staples, whichzareconnected to: each otherFbytheir-middle :andfformrafiat band, whichdatter can berrolled iupiiniitslength. ,fAtthesside ;of:.the container casiin'g h is eprovided withwa tube-shaped gpart :2. for

. 40 .-surroundsfthexcylinder l0.

1The bending :mechanism :consists :.of -a5stamp tor strip [35, which: is 1 provided :with a: pitchforked extremity and .connected :with a ::half acircular cylinder It. The hammering mechanismmonsists of .ta stamp 2H, constituting a unit with the halt-circular cylinder 1 l8,.:on which the-ham- P mer 112' strikes". when the-spring I 3 is: released.

"lTherfree :extremitiesofthe hood: and. a :strip .12 l! form legs-:on whichrthez'apparatus:rests, when placed 2 against a packing-case into which the staples are to .be driven.

:Ifr..the;hand1e l l iszpressedrdown, the bending stamp sl5,--.whi'chr:is connected. byw-a bolt 22 with the half circular cylinder 16 and the cylinder wall 25.5 @:l;0, .-fol-lows.thermovement. 'lheihalf circularcylinder I8 overlaps the cylinder I6 in such a way, that the part I8, though taken along in an upward direction by the part I6, is only coupled by friction to part I8, during the downward motion ofpart I6. After a certain stroke of the bending stamp, the pawl 5 is raised by the edge 23 of the cylinder l0. During this feeding period the spring I3 has been compressed. After the raising of the pawl 5, the spring I3 is released by which the hammering stamp I'I receives a strong stroke of the hammer I2. If the handle II is released, both stamps I5 and I! are moved back to the starting position, after which the pawl 5 again locks the piston I2. The pawl pierces through a slit 24, which is provided in the cylinder III.

During these motions the piston and the hammering stamp are guided in the hood 3. In the hood a fill plate 26, two strips 21, a U-shaped bent strip 28, and an anvil 29 are provided. The casing of the hood with the above mentioned parts are fastened by bolts 36 on the casing I, for which purpose screw holes 3| are provided. The hammering stamp I1 fits exactly between the strips 21 and is a little less thick than these strips. When the hammering stamp is in a depressed position, it projects through an opening 32, which is formed between fillplate 26, and the edges of the strips 21. The bending stamp I5 fits exactly between the legs of the U-shaped strip 28. This stamp has a pitch-forked extremity, the form of which matches that of the U- shaped strip. The bending of the staple is effected by the pitchforked extremity of the stamp I5, which bends the staple around the anvil.

Before the thus bent staple can be driven home by stamp II, the staple must first be moved horizontally so that it comes to lie above opening 32. This is what dog I serves for. This dog is turned against the force of the spring 9 of the hood 3, when the bending stamp I5 presses against the nose 33 of the dog I. The dog I is provided with two arms la the extremities 34 of which press against the bent staple, when springing back. In consequence the bent staples are shifted in a horizontal direction, so that they are shoved into positions in alignment with the opening 32.

As the bent staple is still fixed to the other remaining staples, a new staple is thus brought under the pitchfork.

It is not necessary that in one working-movemerit, by pushing the handle II down once, a staple be bent and the immediately annexed one be hammered home, but between these a certain I difference may exist, dependent on the difference in thickness of the two stamps I5 and I]. In the execution example Fig. 6 this difference is three. By this the advantage is obtained that each staple is bent three times by the stamp I5 before this staple reaches the opening 32, by which is avoided that the bent staples acquire a slanting position, which would hamper the passage. In Fig. 6 the 'moment is represented in which the dog I during the upward movement of the stamps is still just retained.

In Fig. 6 the three bent staples are represented at 35. The fiat staple band is shown at 36 and this band may be coiled in the casing I so as to store about five thousand staples therein. The staple band is guided from the casing I to the anvil by means of a plate I9. The plate I9 is secured to the casing I by screws 40.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent', is: V

1. In an apparatus for bending and driving staples formed from a flat band of staple material, an anvil, a strip having prongs for bending the staples over said anvil, a hollow shaft connected with said strip, a hammer, a spring interposed between the hammer and one end of said shaft, a pawl for retaining said hammer, a strip for severing staples and hammering said staples when the pawl holding the hammer is released, means to release said pawl at the end of the stroke of the bending strip, means for guiding said strips in said hollow shaft, and means for feeding the staple material.

2. In an apparatus for bending and driving in staples formed from a flat band of staple material, an anvil, a strip having prongs for bending the staples over said anvil, a hollow shaft connected with said strip, a hammer, a spring interposed between the hammer and one end of said shaft, a pawl for retaining said hammer, a strip for hammering the staples when the pawl holding the hammer is released, means to release said pawl at the end of the stroke of the bending strip, two plungers one forming part of the bending strip nd the other a part of the strip for severing and hammering the staples.

3. In an apparatus for bending and driving in staples formed from a fiat band of staple material, an anvil, a strip having prongs for bending the staples over said anvil, a hollow shaft connected with said strip, a hammer, a spring interposed between the hammer and one end of said shaft, a pawl for retaining said hammer, a strip for hammering the staples when the pawl holding the hammer is released, means to release said pawl at the end of the stroke of the bending strip, two plungers one forming a part of the bending strip and the other a part of the strip for severing and hammering the staples, one of said plungers having a notch cooperating with the other plunger in such a manner that the strip for severing and hammering the staples is retracted together with the strip for bending the staples.

4. In an apparatus for bending and driving in staples formed from a fiat band of staple material, an anvil, a strip having prongs for bending the staples over said anvil, a hollow shaft connected with said strip, a hammer, a spring interposed between the hammer and one end of said shaft, a pawl for retaining said hammer, a strip for severing and hammering the staples when the pawl holding the hammer is released, said strip for bending the staples having a greater thickness than the strip for hammering the bent staples so that the staples are bent as many times as the bending stamp is thicker than the driving strip before being driven.

REURT CORNELIUS HAZEYVINKEL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 943,045 Osterholm Dec. 14, 1909 1,568,260 Bates Jan. 5, 1926 1,761,646 Palrngren June 3, 1930 1,943,661 Ellacott Jan. 16, 1934 FOREIGN PATENTS Number Country Date 705,668 France I- Mar, 16, 1931 122 1 Great Britain Mar. 13, 1930 

